pūtahi tāpea hōihoi
Kei te whakaputa i tētahi whakamahinga nui te pū kōwhaiwai China taper, i roto i te hunga matatika o te hanganga kōwhaiwai, ā, i hanga hei whakaaweawe i ngā mahi kōwhaiwai i raro i te hanga o te whenua. Ko tēnei taputapu whakaritea he wāhi whakawhiti i ngā hapa tungsten carbide, i tauria ki te whakapai i te hohouritanga me te whanaketanga o te kōwhaiwai. Ko te hanga o te pū ko te toko i runga i te aha, me ngā hapa e whakarite ana i ngā wāhi hapa, e whakamana ana i te wehenga o te kaha i waenganui i ngā mahi. Ko te koki tāpuke i whakatauhia ki reira hei whakapai i te raruraru i waenganui i te āhuatanga o te kōwhaiwai me te whakatika o te rua, ā, kei te pai rawa i te whakatupu i te hiahia i waenganui i ngā tahataha whenua iti noa ki ngā tahataha whenua nui. Kei te hanga ngā hapa i runga i te tungsten carbide nui, i whakamahana hei whakatika i te whakapae me te roa o te whakamutunga. Ki ia hapa, kei te whakatakoto tonu ki te tinana o te pū i runga i ngā momo hanga matua, hei whakaae i te korekorenga i waenganui i ngā mahi. Ko ngā rauwhiringa whakakī mai he whakatakoto pai ki te whakatipu i te kōwhaiwai i ngā kaiwhakakī mai, me te whakamana i te wehenga o te wāhi o te kōwhaiwai. E whai ana tēnei pū i waenganui i te 32mm ki te 64mm i te whatitiri, hei whakarite i ngā hiahia kōwhaiwai e rerekē ana. Ko te hanga anō he whakauru i ngā wāhanga hei whakaiti i te mamae pūtaiao, me te whakapai i te tino tika o te kōwhaiwai, ā, ka pai hei whakamahi mō ngā mahi i runga i te whenua rānei, i raro i te whenua.